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    <meta charset="UTF-8">
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    <title>Document</title>
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<body>
    <div class="he">
        <input type="text" class="zuo">
        VS
        <input type="text" class="you">
        <button class="jie">最大的数是>></button>
        <span>?</span>
    </div>
</body>

</html>
<script>
    var zuo = document.querySelector(".zuo")
    var you = document.querySelector(".you")
    var jie=document.querySelector(".jie")
</script>